Filter.



i PatentedE July I5, -I902. W. R: POWELL. y

` FILTER.

(Application med Nov. 27. 1901.)

2 Sgheeis-Sheet 2.

(No MoIIeI.)

W/ TNE SSE S vBr mi mams muscu.. Pnmuuwo.. msnmarurl, n, c,

WILLIAM R. POWELL, OF WHEELING, VVES'I VIRGINIA, ASSIGNOR OF ON UNITEDSTATES` PATENT OFFICE.

HALF TO CHARLES WOOD, OF WHEELING, WEST VIRGINIA.

FILTER.

SPEGIFICATION forming' part of Letters Patent No. 704,921, dated July15,1902. l

Application iiled November 27, 1901.v Serial No. 88,842. (No model.) y

To all whom t may concern:

Be it known that i, WILLIAM R. POWELL, a citizen of the United States,and a resident of W'heeling, in the county of Ohio andState of WestVirginia, have invented new and useful Improvements in Filters, of whichthe following is a full, clear, and exact description.

The invention relatesto a class of filters in which a naturalorartificialporousblock is, employed as a iiltering medium, and haslforwas will be hereinafter fully set forth,and point ed out in the claims. p

Reference is to be had to theaccompanying drawings, forminga partof thisspecification, in which similar characters ofy reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional side View oi the improved ilter substantially onthe line 1 1 in Fig. 2. Fig. 2 is a sectional-plan view substantially onthe line 2 2 in' Fig. 1, and Fig. 3 is an enlarged side view of atscraper employed. Y

The improved lilter may be used for the separation of sedimentaryimpurities from liquids oi different kinds, andas a water-lilter may beof large or small vdimensions to suit the requirements of the service'to be rendered by the iiltering device.

The iilter shown in the drawings to illustrate the construction andapplication of the invention is best adapted for filtering water forhousehold use or the filtering in moderate quantity of waterto render itpotable and is constructed as follows:

The casing 10, which is the main receptacle of the iiltering device, ispreferably cylindrical and provided with an integral top wall 10, thatyis dome-shaped, as shown in Fig. 1, and said casing may with advantagebe manufactured of seamless steel and protected by enamel. The bottomwall 11 consists of a hat disk of plate metal, havinga U-shaped channelc formed on its circular edge, the lower the passage b.A

true edge of the casing 10 having an air-tight seat in the channel a.

A cylindrical porous block 12 is fitted water-tight Within the casing 10and secured at a suitable point between the ends of the casing, andforefficiency in service the block should have considerable thicknessproportionedto the -length of the casing, so that a water-receivingchamberA of proper dimensions is providedabove the'flltering-block and afiltered-water receptacle.. B below the block. A central passage b isformed in the porous block 12,"and in the `lower counterbored end ofsaid passage a flanged nut 13 is secured in the1 counterbore having itsthreaded orifice dispose'das an extension of An outlet-pipe14,'-havingaspigot l5 therein (see `Fig.` 2) for opening and closing it,is

heidever a central aperture in the bottom wallllby they threadedengagement of an upturnedend of ,the pipe 14 with the lower end of alpipple-tube 16, which extends upward through the water-chamber B andscrews at its upperrend' into the nut 13.- A center shaft 17 is securedat the lower end in the upward bend of the outlet-pipe 14, and thenceextends up through the nipple-tube 16, porous block 12, and upper wall10 of the casing l0 andhas a thread on its extension upper end engaged.by a nut 17, which screws down upon a join t-ring c, placed between thenut and the `wall 10, as clearly shown in Fig. 1.

It will be seen that the shaft 17 serves asa clamping-bolt for securingthe bottom wall l1 upon thefcasing 10 and also holds the outletpipe 14in enforced engagement with the jointring d, which is mounted upon thelower end of the nipple-tube 16 and seats upon the lower side of thebottom wall 11l adjacent to the tube.

An inlet for liquid, suchas water which is to be iiltered,extends from asource of water-supply under pressure and .enters the casing 10 abovethe porous block-12, said supply-pipe 18 tapping the casing'near theupper surface of the porous block and being disposed tangentially to thewall of the casing, as best shown in Fig. 2.

Upon the portion of the shaft 17 that passes ICO through thereceiving-chamber A a scraper device is loosely mounted and consists,essentially, of a preferably rectangular platemetal body 18a, havingScrapers 19 held in position for service on its lower edge. A top flange18b is laterally projected from the upper portion of the body-plate 18a,and at the longitudinal center of said body-plate a complementary flange18c is formed or secured thereon, as is clearly represented in Figs. 1and 3. The iange 18c is preferably formed integral with the body-plate18, and consists of a portion of said body-plate partially released bycutting two parallel-spaced slits from the lower edge of the body-plateat points equally distant from the ends of the same. The materialbetween the slits mentioned is folded upon itself. Then the thickenedflange 18C is bent upward, so as to dispose it parallellwith the topflan ge 18", and the latter in order to afford weight to the bodyplatemay with advantage extend the entire length thereof. At the longitudinalcenter of the scraper-body 18 alined perforations are formed in thefianges 18h18, of a suitable diameter for the reception of the shaft 17,which disposes the scraper-body transversely of the chamber A, and saidbody has clearance atits ends from the side wall ofthe casing 10. Thelower portions of the scraper-body 18, at each side of the liange 18C,each have a clamping-liange 18d formed thereon near the lower endthereof, and said clamping-lianges are adapted to hold thel two similarscraperblades 19 in place projecting from the lower edge of the bodyportion 18. The scraperblades 19 may with advantage be formed ofabrasive material, such as strips of consolidated corundum or the like,which will bite on the upper surface of the porous block 12 and scrapeit clean when the bodylS and the Scrapers 19 are together rotated.

A spigot 20 is affixed to the wall of the casing 10, near its loweredge, and taps the chamber B, as shown in Fig. 1, for drawing from saidchamber the water that has been filtered.

It will be seen that when the spigot 15 is closed water which enters theupper chamber A through the supply-pipe 18, which is to be controlled bya valve (not shown) in said pipe, will permeate the porous block 12 andbe mechanically purified, the sediment being deposited upon the uppersurface of the porous block. At the proper intervals of time theaccumulated impurities may be removed from the upper surface of theporous block l2 by opening the-waste-spigot 15, which will permit a iowof water down through the central passage b, nipple-tube 16, and saidspigot, which .will continue while the inlet-cock and discharge-spigotare in opened condition. The iniiowing jet of water from the inlet-pipe14: will strike the scraper-body 18a near its ends, successivelyimpinging each scraper-blade 19 on an adjacent side of the block 12. Asthe relative position of the inlet-pipe 14 adapts the Water forcedtherefrom against the end portions of the scraper-body to impingethereon at or near a right angle thereto, it will be apparent that theforce of the water-jet will rapidly rotate the scraper device indirection of the arrow m in Fig. 2, and thus cause the scraper torelease impurities from the filtering medium. This sedimentary depositbeing mixed with the swirling current is carried therewith away throughthe spigot 15 to a point of discharge.

It will be seen that the cleansing operation is automatic and may becontinued until the filtering-block 12 is thoroughly cleaned on its topsurface, the abrasion of the Scrapers 19 serving to cut away glazing ofhard deposit, that tends to stop up the pores of the block.

The casing 10 may be secured at a desired point above a sink-basin orother receptacle for waste water by the attachment of the ears 10d onthe casing to a stable support, whereby the filter will be maintainedupright and in position for service as required.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. In a filter, the combination, with acylindrical casing, a securable bottom wall on the casing, and awaste-water spigot, of a porous Iiltering-block secured in the casingbetween its ends and having a central passage therethrough, aliquid-inlet above the block, a nipple-tube extended from the lower endof the central passage in the porous block and adapted to communicatewith the waste water spigot, a spigot for drawing filtered liquid fromthe lower portion of the casing, and. a scraper device adapted forrotation in contact with the upper surface of the porous block,when acurrent of liquid passes through the casing.

2. In a filter, the combination, with a cylindrical casing, a removablebottom wall therefor, and a waste-liquid discharge-spigot, of a porousfiltering-block secured in the casing between its ends and having acentral passage therethrough, a nipple-tube extended from said centralpassage down through the bottom wall of the casing, a center shaftsecured at its lower end to the waste-liquid discharge-spigot and at itsupper end upon the top wall of the casing, a scraper device looselymounted upon the shaft and contacting with the upper end of the porousblock, a liquidinlet pipe tapping the side of the casing and extendedtangentially therefrom so as to direct a liquid-jet upon the ends of thescraper device for its rotation, and a spigot for drawing liquid'fromthe lower portion of the cas- 1ng.

3. In a filter of the character described, the scraper device,comprising a plate-metal body having two spaced flanges projected at oneside thereof, and a pair of scraper blades clamped on the scraper-bodyat its lower edge, said scraper-blades being adaptedto rotate IOC IIO

and bear upon a, filtering-block for removing l lower edge of thescraper-body, adapted for 1o sediment therefrom. engaging the top of thefiltering-block.

4. In a filter of the character described, the In testimony' whereof Ihave' signed my combination with a filtering-block held in al.` name tothis specification in the presence of 5 casing, of a shaft passingloosely through the two subscribing Witnesses.

ltering-block, and a scraper device compris- WILLIAM R. POWELL. ing alaterally-Hanged platemetal body hav- Witnesses: ing perforations in theanges for loosely re- A. W. SMITH,

ceiving the shaft, and scraper-blades on the II. C. PETERMANN.

